William mullins



@teiten intra atmt @fitta Letters Patent No. 76,500, dated April 7, 1868.

IMPROVED MODE OP LOCKIN G NUTS.

ltlj Schwule nfntet in in tigen tntets patent mit milling ,tart nt the stmt.

TO ALL WHOM I'I MAY CONCERN:

Be it known thatI, WILLIAM MULLINS, of the city of Pittsburg, in the county of Allegheny, and State of Pennsylvania, have invented a new and useful Improvement in the Mode of Locking Nuts; and I do hereby declare the following to be aA full, clear, and exact description thereof.-

' My improved device for locking nuts, or preventing them from turning on the bolt on which they are screwed, consists of'a pin of wrought iron or other suitable material inserted under the nut, near to the bolt, in a groove or slot made in the surface against which the nut is screwed, such pin being made L-shaped, or with a rectangular head, and the other end being turned up so as to embrace the nut.

To enable others skilled in the art to use my invention, I will proceed to describe it, by'referring to the accompanying drawing, in which.

Figure 1 is a perspective representation of my improvement as applied to the locking of nuts used to fasten the ends of rails by means of a fish-bar. l

Figure 2 represents the pin used for fastening the nuts.

Figure 3 is a side view'of a nut-bolt, showing the manner in which the pin holds the nut.

Figure 4 is a perspeotire representation of e'nut recessed'teereceive the locking-pin.

In the several figures llike letters refer to similar parts.

In the drawing, tig. l, a and b are rails, connected by. means of fish-bars, c, placed in the usualway, on each side 4of the web of the rails, and secured by means of screw-bolts e e, on which are screwed the nuts d d. The nuts d d are screwed down to the face of the {ish-bar e without the interposition of a Washer, although awasher may be used, if desired, as hereinafter explained.

In the face of the sh-bar is cut a groove, t', deep enough to receive the metallic pins t, so that the outer side of the pin, when in the groove, will be iush with the surface of the fish-bar. This groove z'is cut above the hole through which the bolt e is to pass, so as not to interfere with it.

When the nut d is screwed on the bolt e, down to the fish-har, a wrought-iron pin, z, of the shape shown in tig. 2, having one end turned np so as to make a rectangular head, like a tenter-hook, is driven into the groove 2', under thenut, until the head 7L rests against one side of the nut 02, the shank of 'the pin being long enough to extend beyond the nut, on the pposi'te side, so that the shank may be 'turnedup at right angles to the fishbar c, close against the sido of the nut, as shown in fig. 3, and the head L and turned-up end 7i, of the pin may embrace the nut. In this lrelative position of the nut Aand pin, itis impossible for the nut to turn on the bolt, as it cannot do so without removing the pin from its groove, 1,', in'which it is firmly held by the nutitself.

If it be desired to make use of a washer under the'nut, it may be done vby making the Washer circular, and

of diameter no greater than the width of thennt, seas to allow the pin to be turned up against the sides of the v nut, the washer, as well as the nut, being placed over the pin.V

`Ihe pin may be made of the shape shownl in iig. 2, with one end ready turned vup or headed, or a straight vpin mar be inserted in the groove and afterwards turned up at both ends against the sides of the nut.

As shown in fig. l, the nut may be locked either with two sides at right angles to the groove v"i, or in a diagonal position, all that is requisite beingthat the nut vshould hold thepin down in the groove, and that the pin should so embrace the nut as to prevent its turning. I

If desired, in order to improve the finish and appearance of the work, a'slot, s, (see tig. 4,) may be made in the sides of the nut, to receive the turned-up end or ends of the pin, the `extremity ofthe pin being dressed down even with the top of the nut. i

My improved mode of locking nuts 1s applicable to almost all circumstances in which nuts are employed,

and to all descriptions-of machinery and structure in whiclzthe'y can be used, the only condition which is neces-v sary bein'g that. there should be a solid material under theI n11t, 'and against which it is to be screwed, in which to make the groove to receive the lockin/g-pin. l i l My improvement commends itself` by its great simplicity, andthe ease with which it may be applied, requiring, as it does, nothing buta metallic pin in addition to the ordinary bolt and nut, and the cutting of a groove to receive the rirnl AHaving thus described my impovement, what I claim as my invention, and desire to secure by Letters Patent, is Y i *Y The improved device for locking nuts, consisting of a. metallic pin placed under the nut, in a. groove Vin the surface, against which the nut is screwed, and'turned up so as to embraee the nut, substantially as hereinbefore described.

In testimony whereof, I, the'said WILLIAM` MULLINS, have hereunto set my hand. i

W. MULLINS.

Witnesses;

W. BAKEWELL, A. S. NIcHoLsoN. 

